diff --git a/InvenTree/build/models.py b/InvenTree/build/models.py
index b3399ece59..ada9db1e08 100644
--- a/InvenTree/build/models.py
+++ b/InvenTree/build/models.py
@@ -269,13 +269,17 @@ class Build(MPTTModel):
         else:
             descendants = self.get_descendants(include_self=True)
             Build.objects.filter(parent__pk__in=[d.pk for d in descendants])
-
     
     def sub_build_count(self, cascade=True):
+        """
+        Return the number of sub builds under this one.
+
+        Args:
+            cascade: If True (defualt), include cascading builds under sub builds
+        """
 
         return self.sub_builds(cascade=cascade).count()
 
-
     @property
     def is_overdue(self):
         """
diff --git a/InvenTree/build/templates/build/build_children.html b/InvenTree/build/templates/build/build_children.html
index 87c8bd8608..c996aaa84f 100644
--- a/InvenTree/build/templates/build/build_children.html
+++ b/InvenTree/build/templates/build/build_children.html
@@ -25,6 +25,8 @@
 
 {% block js_ready %}
 
+{{ block.super }}
+
 loadBuildTable($('#sub-build-table'), {
     url: '{% url "api-build-list" %}',
     filterTarget: "#filter-list-sub-build",
diff --git a/InvenTree/build/test_api.py b/InvenTree/build/test_api.py
index 41b09c8e08..bcfd600e9e 100644
--- a/InvenTree/build/test_api.py
+++ b/InvenTree/build/test_api.py
@@ -4,7 +4,6 @@ from __future__ import unicode_literals
 from datetime import datetime, timedelta
 
 from rest_framework.test import APITestCase
-from rest_framework import status
 
 from django.urls import reverse
 from django.contrib.auth import get_user_model
@@ -64,11 +63,11 @@ class BuildListTest(BuildAPITest):
 
     url = reverse('api-build-list')
 
-    def get(self, status=200, data={}):
+    def get(self, status_code=200, data={}):
 
         response = self.client.get(self.url, data, format='json')
 
-        self.assertEqual(response.status_code, status)
+        self.assertEqual(response.status_code, status_code)
 
         return response.data
 
@@ -102,7 +101,7 @@ class BuildListTest(BuildAPITest):
 
         part = Part.objects.get(pk=50)
 
-        build = Build.objects.create(
+        Build.objects.create(
             part=part,
             quantity=10,
             title='Just some thing',
diff --git a/InvenTree/report/templates/report/inventree_build_order_base.html b/InvenTree/report/templates/report/inventree_build_order_base.html
index 0a4f8b3bb6..46e7544df5 100644
--- a/InvenTree/report/templates/report/inventree_build_order_base.html
+++ b/InvenTree/report/templates/report/inventree_build_order_base.html
@@ -2,9 +2,9 @@
 
 {% load i18n %}
 {% load report %}
+{% load barcode %}
 {% load inventree_extras %}
 {% load markdownify %}
-{% load qr_code %}
 
 {% block page_margin %}
 margin: 2cm;